Question 4

计算机生成了可选文字: The principal reason ionic compounds are stable is the attraction between ions Of opposite charge. This attraction draws the ions together ， releasing energy and causing the ions to form a solid array ， or lattice ， such as that shown in Figure 8 ． 3 ． A measure of how much stabilization results 什 om arranging oppositely charged ions in an ionic solid is given by the lattice energy ， which is the “ “ 罗 required co e 纱 separate 0 ” e mole Ofa solid io CO PO d 仂 its g eo io ． TO envision this process for NaCl, imagine that the structure in Figure 8 ． 3 expands from within ， SO that the distances between the ions increase until the ions are very far apart. This process requires 788 kJ/moI, which is the value of the lattice energy: NaC1(s) -- - 一 十 (g) + Cl-(g) AHIattice = +788kJ/moI \[ 8 ． 3 \]

计算机生成了可选文字: N ） + Lattice Energy an Ionic Compound Heat 」 } = lattice “ “

Question 9-12

  • Buffer

    • Weak Acid + Its Congregate Base

    • Weak Base + Its Congregate Acid

Question 13-16

A macromolecule is a very large molecule, such as protein, commonly created by polymerization of smaller subunits (monomers). They are typically composed of thousands of atoms or more.

Question 23

CONVECTION CURRENT cool gas falls rm gas rises heat source

Question 27

  • A visible-light spectrophotometer can determine the concentration of a solution

    Wavel ength Selector White Light Sol Ltion Detector ransmitted The difference between the incident and transmitted light indicates the absorbance

Spectrophotometer lens light source slit prism or grating readout .21 detector sample

Question 30

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Question 31

moles or solute mole traction, X molarity,M nolality,m - moles ot solutior moles ot solute liters of soluåon moles ot solute k ot solve

Question 32

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Question 35

计算机生成了可选文字: = 6 们 23 國到@01一与 对 O （ = 5Cm01 一

Question 38

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Question 39

  • The normal melting point of a solid is defined as the temperature at which the solid and liquid are in equilibrium at a total pressure of 1 atmosphere.

Question 43

  • When excess ammonia is added to a solution of Cu(NO3)2, the color of blue will be darker.

  • Cu(NO3)2 + 4NH3 = [Cu(NH3)4]](NO3)2

    计算机生成了可选文字: PHOT• ． R A PH S to.com

  • Adding Ammonia To Copper II Nitrate.

  • (left) Solution of blue Cu(NO3)2*6H2O (complex ion is Cu(H2O)6 +2).

  • (right) Addition of NH3(aq) forms deep blue complex ion [Cu(NH3)4(H2O)2]2+.

Question 53

计算机生成了可选文字: Gases W and X react in a closed ， rigid vessel to form gases Y and Z accordmg to the equation above. The initial pressure of W(g) is L20 atm and that of X(g) is L60 atm No Y(g) or Z(g) is initially present. The expenment IS carried out at constant temperature. What is the partial pres- sure Of Z (g) when the partial pressure of W(g) has decreased to 1.0 atm?

计算机生成了可选文字: 4 、 ， 10 eZO ． 0 l.u 0

Question 54

Keq Only a temperature change can affect the value of Keq. Changes in concentrations, pressure or surface area have NO effect on Keq. These changes correspond to increase in number of reacting molecules per liter. — Increased once and then equilibrium is re-established. So ratios of products to reactants do not change.

Question 56

Lead(ll) iodide Chemical Compound Lead(ll) iodide or lead iodide is a salt with the formula Pbl 2. At room temperature, it is a bright yellow odorless crystalline solid, that becomes orange and red when heated. It was formerly called plumbous iodide. Wikipedia Formula: Pb12 Molar mass: 461.01 g/mol Density: 6.16 g/cm3 Boiling point: 872 oc Appearance: bright yellow powder

Question 57

  • The standard reduction potential is an intrinsic property. It will not change by the coefficient.

Question 63

Zeroth Order First Order Second Order Differential rate law Concentration vs. time Integrated rate law Straight-line plot to determine rate constant Relative rate vs. concentration Half-life Units of k, rate constant Rate = At Time Slope = k Time Rate, M/S 4 9 2 3 0.693 l/s

Question 54

What is the molar solubility in water of Ag2Cr04 ? (The Ksp for Ag2Cr04 is 8 x 10-12.)

0 , 乂 一

Question 70

НзРО4 2НзРО4+ Фосфорн разлпчнымп Фосфорную выпадению раствором н С солями 2+3Н2О вовать с ел11ть по H3P04+3AgN03=Ag3P04J+3HN03

Question 72

Crucible originally used for metal, glass, and pigment production, a crucible is a container that can withstand temperatures high enough to melt or otherwise alter its contents

Question 74

  • SO2 is a polar molecule, so it will deviate from ideal behavior.

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